The infographic by me summarises information about bicolour cats. I hope you find it useful. There are image links to more pages on piebaldism and bicolour cats after the infographic.
Note: I am indebted to Sarah Hartwell of messybeast.com for her knowledge on piebaldism and the images in the middle of the infographic about grading. Other source: me and Gloria Stephens of Legacy of the Cat.